from lxml import etree
import requests

# response=requests.get('https://www.geekdigging.com/')
response=requests.get('https://www.naixue.org/49229.html')
htmlstr=response.content.decode('utf-8')
html=etree.HTML(htmlstr)
result=etree.tostring(html,encoding='utf-8').decode('utf-8')
a=html.xpath('//a[@class="imageclick-imgbox"]//@src')
print(a)